方法一、使用add constraint 方法添加主键约束 alter table 表名 add constraint 主键名 primary key (列名1,列名2,...) 方法二、使用索引创建主键 (和方法一没有区别,可以将方法一理解为省略了using index) alter table 表名 add constraint 主键名 primary key (列名1,列名2,...) using index [index_name...
Posted by Richard Foote in Block Dumps, Index Organized Tables, IOT, Oracle Indexes, Primary Key, Secondary Indexes. 7 comments As discussed previously, one of the nice features of an IOT Secondary Index is that it contains the mandatory Primary Key of the IOT, which is always maintained ...
PRIMARY KEY Oracle中如果存在两张表具有相同的主键字段,则在执行ALTER TABLE时需加上表名进行区分。 输入:PRIMARY KEY CREATETABLECTP_ARM_CONFIG(HOSTNAMEVARCHAR2(50),OPNAMEVARCHAR2(50),PARAMTYPEVARCHAR2(2),PARAMVALUENUMBER(*,0),MODIFYDATEDATE)SEGMENTCREATIONDEFERREDPCTFREE10PCTUSED0INITRANS1MAXTRANS255NOC...
When the put(E) method returns, the primary key field of the entity object will be set to the assigned key value. For example:Employee employee; employee = new Employee("Jane Smith"); primaryIndex.putNoReturn(employee); // Inserts an entity assert employee.id == 1; employee = new ...
Oracle 删除和重建由primary 约束建立的索引 drop index时出现如下错误：SQL> drop index oos_index;drop index oos_index ERROR at line 1:ORA-02429: cannot drop index used for enforcement of unique/primary key 我们知道当创建Primary key和unique约束时，如果在该key上不存在索引，则Oracle会自动创建对应的...
SQL> ALTER TABLE larry_test ADD CONSTRAINT pk_larry_test PRIMARY KEY (terminal_id)USING INDEX TABLESPACE indx; Table altered. 当然如果再灵活些,还可以指定索引的存储参数等等。 同时还有两个小问题: 首先我们都知道所谓主键就是,该字段或多个字段上为唯一(unique)索引且字段不为空。
Oracle automatically creates an index key when a primary key is defined on a table, which improves the performance of queries. Moreover, this column cannot store null values that ensure uniqueness and data integrity. Create an Oracle Table with a PRIMARY KEY To create a table named “Mannequins...
ALTER TABLE TEST.TEST ADD CONSTRAINT PK_TEST PRIMARY KEY (OBJECT_ID) USING INDEX TABLESPACE TEST_DATA; 1. 1. CREATE TABLE TEST.RF_TEST 1. ( 1. ID NUMBER, 1. OBJECT_ID NUMBER 1. ); 1. 1. ALTER TABLE TEST.RF_TEST ADD CONSTRAINT PK_RF_TEST PRIMARY KEY(ID) USING INDEX TABLESPACE...
根据报错,貌似是primary key创建失败导致的。 代码语言:javascript 复制 SQL>ALTERTABLET12ADDCONSTRAINTT1_PK3PRIMARYKEY(BEN)USINGINDEX(CREATEUNIQUEINDEXT1_PKONT1(BEN)PCTFREE10INITRANS2TABLESPACEPOOL_IXLOGGINGSTORAGE(INITIAL16384NEXT16384MINEXTENTS1MAXEXTENTS400PCTINCREASE0FREELISTS1))4567891011;ALTERTABLET1*ERROR...
Annotation Type PrimaryKey @Documented @Retention(value=RUNTIME) @Target(value=FIELD) public @interfacePrimaryKey Indicates the primary key field of an entity class. The value of the primary key field is the unique identifier for the entity in aPrimaryIndex. ...